Question

42. If the annual rate of simple interest increases from 8% to 12%, a man's annual income increases by Rs 960. The principal is (a) Rs 20000 (b) Rs 24000 (c) Rs 22000 (d) Rs 18000​

Answer 1

Step-by-step explanation:

Let Principle and interest be x₹ and 100₹ respectively

$x \times \frac{8}{100} \times 1 = 100 \\ \\ \frac{8}{100} x = 100 \\ \\ x = 100 \times \frac{100}{8} \\ \\ x = \frac{10000}{8} \\ \\ x = 1250$

So principal is 1250₹.

$\frac{4}{100} x = 960 \\ \\ x = 960 \times \frac{100}{4} \\ \\ x = \frac{96000}{4} \\ \\ x = 24000$

Answer 2

Answer:

Let Principle and interest be x₹ and 100₹ respectively

\begin{gathered}x \times \frac{8}{100} \times 1 = 100 \\ \\ \frac{8}{100} x = 100 \\ \\ x = 100 \times \frac{100}{8} \\ \\ x = \frac{10000}{8} \\ \\ x = 1250 \\ \\ \end{gathered}

x×

100

8

×1=100

100

8

x=100

x=100×

8

100

x=

8

10000

x=1250

So principal is 1250₹.

\begin{gathered} \frac{4}{100} x = 960 \\ \\ x = 960 \times \frac{100}{4} \\ \\ x = \frac{96000}{4} \\ \\ x = 24000\end{gathered}

100

4

x=960

x=960×

4

100

x=

4

96000

x=24000

please drop some ❤️❤️❤️

Step-by-step explanation:

please f-o-l-l-o-w m-e bro please